[GHC] #13043: GHC 7.10->8.0 regression: GHC code-generates duplicate _closures

[GHC]

#13043: GHC 7.10->8.0 regression: GHC code-generates duplicate _closures
-------------------------------------+-------------------------------------
        Reporter:  hvr               |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.0.2
       Component:  Compiler          |              Version:  8.0.2-rc2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by rwbarton):

 I think this is a duplicate of an existing ticket, the `let !_ = ...`
 "pattern" looks familiar.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13043#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler